Reservoir modeling

Abstract

A method can include receiving sample information for reservoir fluid samples and automatically selecting one or more equations of state from a plurality of different equations of state, which can suitably match the reservoir fluid samples and/or other samples. Such a method can also include automatically generating initial conditions based at least in part on sample information where such initial conditions along with one or more selected equations of state can be utilized in simulating physical phenomena using at least a reservoir model to generate simulation results. Such a method can include outputting at least a portion of the simulation results, which may be utilized in one or more processes.

What is claimed is: 
     
         1 . A method comprising:
 receiving sample information for reservoir fluid samples;   automatically selecting one or more equations of state from a plurality of different equations of state;   automatically generating initial conditions based at least in part on the sample information;   simulating physical phenomena using at least a reservoir model to generate simulation results, wherein the simulating utilizes the selected one or more equations of state and the initial conditions; and   outputting at least a portion of the simulation results.   
     
     
         2 . The method of  claim 1 , wherein the initial conditions comprise compositional variation with respect to depth of reservoir fluid for the reservoir model. 
     
     
         3 . The method of  claim 1 , wherein automatically generating initial conditions comprises detecting reservoir compartmentalization. 
     
     
         4 . The method of  claim 3 , wherein the initial conditions comprise a first set of initial conditions for a first reservoir compartment and a second set of initial conditions for a second reservoir compartment, wherein the initial conditions of the first set and the second set differ. 
     
     
         5 . The method of  claim 3 , wherein detecting reservoir compartmentalization comprises comparing compositional variation with respect to depth in different areal regions. 
     
     
         6 . The method of  claim 1 , wherein automatically generating initial conditions comprises determining a location of a fluid-fluid boundary. 
     
     
         7 . The method of  claim 6 , wherein the fluid-fluid boundary corresponds to gas-oil contact. 
     
     
         8 . The method of  claim 6 , wherein the fluid-fluid boundary corresponds to oil-water contact. 
     
     
         9 . The method of  claim 1 , wherein automatically selecting one or more equations of state comprises selecting an equation of state for a reservoir location and selecting another, different equation of state for a surface location. 
     
     
         10 . The method of  claim 9 , wherein the surface location corresponds to a well mixing location where fluid from two or more wells mix. 
     
     
         11 . The method of  claim 10 , wherein the simulating comprises simulating physical phenomena at the well mixing location. 
     
     
         12 . The method of  claim 11 , wherein the well mixing location is in fluid communication with a processing facility and wherein the simulating comprises simulating physical phenomena at the processing facility. 
     
     
         13 . The method of  claim 1 , wherein automatically selecting one or more equations of state comprises testing at least a portion of the plurality of different equations of state with respect to at least a portion of the sample information. 
     
     
         14 . The method of  claim 1 , wherein automatically selecting one or more equations of state comprises ranking at least a portion of the plurality of different equations of state. 
     
     
         15 . The method of  claim 1 , wherein automatically generating initial conditions comprises subdividing a reservoir interval into depth windows. 
     
     
         16 . The method of  claim 15 , comprising estimating a compositional variation with respect to depth for each of the depth windows. 
     
     
         17 . The method of  claim 16 , comprising computing a composition variation with respect to depth for a depth span that encompasses more than two of the depth windows. 
     
     
         18 . The method of  claim 1 , wherein automatically generating initial conditions comprises clustering the reservoir fluid samples based at least in part on the sample information to effectively reduce sample number of the reservoir fluid samples. 
     
     
         19 . A system comprising:
 a processor;   a memory accessibly by the processor; and   instructions stored in the memory and executable by the processor to instruct the system to:
 receive sample information for reservoir fluid samples; 
 automatically select one or more equations of state from a plurality of different equations of state; 
 automatically generate initial conditions based at least in part on the sample information; 
 perform simulation of physical phenomena using at least a reservoir model to generate simulation results, wherein the simulation utilizes the selected one or more equations of state and the initial conditions; and 
 outputting at least a portion of the simulation results. 
   
     
     
         20 . One or more computer-readable storage media comprising processor-executable instructions wherein the processor-executable instructions comprise instructions to instruct a computing system to:
 receive sample information for reservoir fluid samples;   automatically select one or more equations of state from a plurality of different equations of state;   automatically generate initial conditions based at least in part on the sample information;   perform simulation of physical phenomena using at least a reservoir model to generate simulation results, wherein the simulation utilizes the selected one or more equations of state and the initial conditions; and   outputting at least a portion of the simulation results.